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Overview

This code block demonstrates how to query an Iceberg table.

CREATE FOREIGN DATA WRAPPER <wrapper_name>
HANDLER iceberg_fdw_handler
VALIDATOR iceberg_fdw_validator;

CREATE SERVER <server_name>
FOREIGN DATA WRAPPER <wrapper_name>;

CREATE FOREIGN TABLE <table_name> ()
SERVER <server_name>
OPTIONS (files '<files>');
wrapper_name
required

Foreign data wrapper name. Can be any string.

server_name
required

Foreign server name. Can be any string.

table_name
required

Foreign table name. Can be any string.

files
required

The path to the Iceberg table. For instance, s3://bucket/folder if the Iceberg table is in Amazon S3 or /path/to/folder if the Iceberg table is on the local file system.

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Allow Moved Paths

The allow_moved_paths option ensures that some path resolution is performed, which allows scanning Iceberg tables that are moved.

CREATE FOREIGN TABLE iceberg_table ()
SERVER iceberg_server
OPTIONS (
    files 's3://bucket/folder',
    allow_moved_paths 'true'
);

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Linking to the Manifest File

If no version-hint.text file is found in the Iceberg metadata, the following error will be thrown:

Error: IO Error: Cannot open file "s3://⟨bucket⟩/⟨iceberg-table-folder⟩/metadata/version-hint.text": No such file or directory

Providing the path to the <id>.metadata.json manifest will circumvent this error.

CREATE FOREIGN TABLE iceberg_table ()
SERVER iceberg_server
OPTIONS (
    files 's3://⟨bucket⟩/⟨iceberg-table-folder⟩/metadata/⟨id⟩.metadata.json',
);

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Cloud Object Stores

The object stores documentation explains how to provide secrets and other credentials for Iceberg tables stored in object stores like S3.

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